CN104703373B - The supporting arrangement of the rotor of the frame of imaging modality - Google Patents
The supporting arrangement of the rotor of the frame of imaging modality Download PDFInfo
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- CN104703373B CN104703373B CN201410737029.8A CN201410737029A CN104703373B CN 104703373 B CN104703373 B CN 104703373B CN 201410737029 A CN201410737029 A CN 201410737029A CN 104703373 B CN104703373 B CN 104703373B
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- 230000008093 supporting effect Effects 0.000 title abstract description 21
- 238000003384 imaging method Methods 0.000 title description 6
- 239000000523 sample Substances 0.000 claims abstract description 14
- 238000002059 diagnostic imaging Methods 0.000 claims abstract 4
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- 238000005299 abrasion Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 9
- 238000013170 computed tomography imaging Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
- 238000002591 computed tomography Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
- F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
- F16C32/0633—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being retained in a gap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2316/00—Apparatus in health or amusement
- F16C2316/10—Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Theoretical Computer Science (AREA)
- Pulmonology (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The present invention relates to a kind of frame of medical imaging device (2), it has FDB (15), wherein described device has stator (3), rotor (4), the probe unit on rotor (4), FDB (15), and the FDB has the gap (17) between stator (3) and rotor (4) and the rotor (4) is supported with gap (17) relative stator (3).Additional bearing support (22) is provided with the lower zone of rotor (4) and/or near the lower zone of rotor, bearing support (22) starts the supporting rotor with the end of in the rotation of quiescent phase and rotor (4).
Description
Technical field
The present invention relates to a kind of frame of imaging modality, the detection list with stator, rotor, on rotor
Unit, FDB, the FDB has gap between the stator and the rotor and rotor is propped up with the gap relative stator
Hold.Additionally, the present invention relates to it is a kind of for hydrodynamic pressure and/or hydrostatically with respect to imaging modality frame stator supporting
Rotor, wherein, rotor, stator and FDB with probe unit are arranged to so that between constituting between the stator and the rotor
Gap and rotor relative stator is supported by.
Background technology
The three-dimensional tomograph of the inside of check object can be produced by X-ray mode in computer tomography equipment.
For this breaks by the X-ray of probe unit (it has the X source and photographic system that are generally rotated around supporting object) generation two dimension
Layer figure, three-dimension disclocation figure is rebuild by the X-ray tomograph.So-called function element is rotatably supported in frame shell around system axle
On body, the frame housing is set annularly around the receiving space of check object.It is made up of probe unit, bearing and frame housing
Single unit system be referred to below as frame.
X source, photographic system and their control system (being arranged in frame) are typically mounted on so-called tubbiness dress
In the rotating cylinder put, it is connected with rotor or itself constitutes rotor, wherein, rotating cylinder is placed around the rotary state of system axis,
To obtain the X-ray of photograph subject from all directions.
The rotating cylinder being equipped with generally reaches substantially 800 to 900Kg weight (in single origin system, that is, with X source
System).
In order to shoot x-ray image, the inspection during X source is generally consistently centered around frame housing when radioactivity shoots is right
As receiving space rotation, rotary speed is 240 rpms to the maximum.
One important purpose is that patient shines X-ray in short time as far as possible, for keeping less exposure.But
For this must realize rotation duration as short as possible, that is, simultaneously therefore the speed of rotating cylinder is as high as possible to realize radiographic source.
Additionally, whole rotary unit have to be around longitudinal axis and be tilted forward and backward with 30 ° of angle.
Because the friction occurred when rotating cylinder or rotor rotate can cause heat and mechanical wear, its generally by frame or
Supporting arrangement of the rotor in frame housing is minimized.Bearing used by this is also referred to as swivel bearing and is important frame
Part.Traditionally rolling bearing is used for this part.But wherein occur claimed below meeting：As has been described, it is existing
Run in the range of speeds and loading range for CT system, it may causing trouble due to abrasion.Rolling bearing must be maintained.
This generally by lubricating realization again.In addition rolling bearing can also be worn and torn by certain, and this adversely affects system lifetim.
In addition with rotating speed increase, noise level also increase for so that its can especially disturb patient and must by add measure
Reduce.Additionally, rolling bearing is very sensitive for pollution particle, it can damage the raceway of ball and reduce the run time of bearing
Or the life-span.Thus, bearing must especially be protected in transport, because larger collision or lasting vibration can be damaged
Or even damage bearing.
In order to reduce bearing noise level higher under higher rotation speed and therefore be reduced to acceptable level, then must
Manufacture and assembling consuming higher must be paid.The life-span of bearing is limited by the abrasion of contact and bearing in addition.Such as preceding institute
State, the pollutant for improving contact into bearing and point-like can also be reduced the life-span.Side for solving this problem
Case is the process of cleaning to be noted during in construction and using rolling bearing and using for rolling bearing to be polluted into particle relatively
The sealing device or labyrinth-type excluder of sealing.The axis of rolling is also lubricated with uniform spacing again in order to minimize abrasion
Hold, it means that maintenance higher expends.In order to tackle above-mentioned danger in transport, then corresponding guarantor is taken in logistics
Shield measure, such as using special and consuming packaging and pay attention to suitable transportation regulations.
So-called air bearing is also used in modern computer computed tomography (SPECT) system as an alternative (referring to DE
10 2,008 049 050 A1 and Fig. 3 and 4).Air gap is formed wherein between rotate element and stator, wherein being opened in rotor
Compressed air is radially imported by porous (such as being made up of graphite) axial face before beginning rotary motion.If in air axle
Hold and realize fixed minimum pressure in gap, then the element for rotating is suspended on mattress or air film, this causes rotor and fixed
Friction between son is minimized to heavens.Then rotor just starts to rotate.Because contactless rotation causes to safeguard freedom (no
Lubricant must be changed, abrasion is minimum), generate in rotor or drum rotation less noise and produce less heat
Amount.
But because the compressibility very high of air must between rotor and stator realize pressure higher.For this
Air gap between rotor and stator must be kept as very narrow (about 1/1000mm).Typically smaller air gap can
Bear load higher.But this very narrow gap can cause described device to be unable to undergo temperature to be changed, and this temperature changes
Occur all the time in computed tomography imaging system running.Due to the expansion of the material for the device, rotor due to
Rotor card even occurs in the stator when temperature causes expansion.In order to solve this problem, in DE 10 2,008 049 050
As shown in Figures 3 and 4 for stator have selected this special shape in A1 so that gap between rotor and stator is in static shape
It is more than in the middle section of bearing-surface in the perimeter of bearing-surface in state.Rotor outwards expands at a higher temperature, then
Just realize generally remaining the gap of same widths between the stator and the rotor.
But the disadvantage is that, keep the gap of same widths or the perfect condition in the narrow gap of preferable entirety identical to exist
In this air bearing only within specified temperatures, realized under usual running temperature.
Additionally, air bearing must also constantly be provided with compressed air, for keep rotor not with stator contact.For this must
Expensive equipment must be provided be used for air input, for keeping air pressure and for controlling air supply arrangement.Namely
Say, for the less maintenance consuming of bearing and bearing largely without frictional property and without abrasiveness by for periphery
Unit and for maintaining more consumings of the feed unit of the bearing function of air bearing to exchange for.
The content of the invention
Therefore, the technical problems to be solved by the invention are so to provide a kind of for computed tomography imaging system
Rack bearing device and the method for manufacturing this bearing so that on the one hand realize bearing non-maintaining property as high as possible
And the small abrasion in any operation phase, the consuming for holding shaft acknowledgement of consignment row is as small as possible but then.
On the one hand the technical problem is solved by a kind of frame with FDB, and it has stator, rotor, installation
Probe unit, FDB on rotor and it is arranged in the lower zone of rotor and/or near the lower zone of rotor
Additional bearing support, the FDB has gap between the stator and the rotor and the rotor is relative with the gap
Stator is supported.On the other hand the technical problem is used for rotor hydrodynamic pressure ground and/or hydrostatically relative frame by a kind of
Stator supporting method solve.
According to the present invention, the frame have be arranged in the lower zone of rotor and/or the lower zone of rotor on
Additional bearing support.
According to the method for the present invention, additional bearing support be arranged in the lower zone of rotor and/or rotor lower section
On region.
Bearing support (changing kind of an expression) observes vertically on the center line parallel with system axis or attached from system axis
Closely set between rotor and stator, or be arranged on along the axial in the region of approximate centerline of rotor.
Can be caused using additional bearing support, the abrasion of hydrodynamic pressure and/or hydrostatic bearing is disconnected in computer
Contact minimum when layer imaging system starts due to rotor with stator in inactive state, because bearing support is in inactive state
In so supporting and support rotor so that friction between rotor and stator is minimized.
Also there is the frame comprising probe unit according to imaging modality of the invention, it has described hydrodynamic pressure
And/or hydrostatic bearing.
Probe unit (also referred to as scanning system) for example includes the illumination unit and sensor for irradiating object to be checked
Or shooting unit, single x-ray image is projected in shooting unit.Described unit is installed in the element, rotor for rotating or turns
On cylinder, the motionless element of their geo-stationaries, stator rotation.Rotor relative stator is by the hydrodynamic pressure and/or hydrostatic
Bearing is supported by.
Alternately sensor or shooting unit can also be actionless and annularly around system axis extension,
And only X source is fixed on rotor.Shooting unit extends on the whole inner periphery of stator in this case.If rotor exists
Rotated during being irradiated by the X source rotated jointly with rotor, then projection is dispersed in the whole of actionless shooting unit
The shooting face Shangdi of individual annular is taken.
The other particularly advantageous structure designs of the present invention and extension design are drawn by following explanation and accompanying drawing.
In a kind of preferred structure design, bearing support is designed and sized to so that rotor in inactive state so
It is supported by so that rotor does not contact stator.Especially bearing support so sets size so that its rotor startup stage or stop
Next stage supporting rotor, so that rotor does not contact stator.
Therefore friction between rotor and stator is minimized.
Bearing support for example can be rolling bearing or especially ball bearing.In this roller and/or the rotatable twelve Earthly Branches of ball
Hold on rotor or stator and various other parts have suitable bearing-surface, roller or ball are rolled thereon, or rolling
Son and/or ball be not only supported on rotor and be supported on stator and correspondingly two parts with and roller and/or ball
The bearing-surface of mating reaction.
The contact area of rotor and stator in inactive state is below rotor, around center line, that is to say, that institute
Center line is stated by one in oriented by system axis and the vertical demifacet for constituting and perpendicular to the demifacet, contact rotor bearing face
Tangent plane between intersecting straight lines constitute.Center line can also be in rotation axis vertical lower, the rotation axis parallel to rotor
Or extend parallel to system axis.Therefore according to a kind of particularly preferred reasonable in design, at least two bearing supports
Rotor lower section is axially disposed in front and rearly, with the spacing of the fixation of the center line for axially relatively extending vertically, for keeping away
The rotation axis for exempting from rotor is inclined in startup stage or the stage of stopping.The spacing of the fixation should cause bearing support as far as possible
Set with being located remotely from each other, the rotor-position for ensureing stabilization.Numerical value can not be given herein, because it depends on gantry configuration
A variety of geometries or very different scheme of machine design.
Alternately, at least two bearing supports be arranged on rotor lower section, below rotor extend center line right side
And left side.They will also sufficiently close to act on being mounted with joint efforts for the gravity on rotor, for keeping due to perpendicular to supporting
The load and mill of the bearing-surface of the bearing support that the force component or pressure component (normal force or normal pressure) of face orientation are formed
Damage very little.If bearing is too far installed from center line, the normal force or corresponding normal pressure on bearing are very high, therefore
Bearing or the abrasion of bearing components is caused to be increased.
FDB can be hydrodynamic pressure and/or hydrostatic bearing and it can be designed so that obtain stator and rotor tool
There is mutually facing bearing-surface.Bearing-surface is optimized to so that their reductions occur between rotor and stator when rotor rotates
Frictional force.In positioning gap between rotor and stator, the fluid between bearing-surface is used for so that rotor and stator exist
Rotor is separated when rotating by fluid.
The advantage of the bearing of hydrodynamic pressure is that can more simply ensure that rotor relative system axis (rotation axis) is accurate
The supporting of centering.
The advantage of the bearing of hydrodynamic pressure is that the fluid of outflow can be input into gap with no pressure.It means that different
In hydrostatic bearing, the pressure for needed for supporting rotor is constituted without going through single device.And required pressure is by turning
Son rotation and in rotation rotor lubrication wedge formed below itself constitute.Fluid can be defeated in the upper area of bearing
Enter bearing, lower pressure is produced in upper area.Fluid is input into the lower pressure region of bearing.Fluid is additionally provided with herein
Control device, it can targetedly with certain pressure input medium.When fluid space is filled and is closed all the time,
The input is acted on entirely without pressure.
Because rotor and stator do not have Mechanical Contact in operation, therefore can realize smaller operation noise.In addition this
The bearing arrangement of the form of kind realizes the continuous service without abrasion.The relatively low coefficient of friction of FDB also allows smaller
Or lighter rotating driver.Conversely, when stronger rotating driver is not changed using heavier rotor or with bigger
The rotor of diameter.
Due to the pressure higher produced in operation in hydrodynamic pressure bearing arrangement, then a part of fluid can be from bearing
Flow out and bearing must be fed back to by no pressure again.Therefore especially in the bearing of hydrodynamic pressure, described device is preferably also
Feedback device with the fluid for flowing out, its such setting so that the fluid from gap outflow is by the device no pressure
Feed back to gap.
The feedback device is equally so set so that fluid is for example input in the upper area of bearing, wherein producing
Lower pressure, such as on above-mentioned input unit.Fluid is imported into the area of low pressure of bearing.Fluid control can be also provided with
Device, it is targetedly with certain pressure input medium.When fluid space is filled and is closed all the time, the input
Acted on entirely without pressure.
Gap between rotor and stator preferably axially passes outwardly close along the sealing device of the circumferentially extending in gap
Envelope.
This is had the advantage that, pressure higher and therefore for example can be with can be realized in gap by sealing effectiveness
The heavier rotor of supporting.Sealing device especially prevents fluids a greater amount of in inactive state and in operation from gap or axle
Hold middle outflow.
Sealing device is additionally operable to close or protects bearing not receive due to being polluted caused by external particle, and this is avoided by this
Abrasion caused by a little pollution particles.The closure of bearing also achieves availability higher in unfavorable environmental condition.
Fluid for example can be lubricant or antiseize paste.It especially has the lubricant of oil, oily matrix or oil-containing.Fluid
Additive can also additionally be included.
Oily or by oil generation oil film has extraordinary damping performance and it is achieved that rotor specially is quiet
Operating.The use of oil also improves the mechanical load performance of bearing, and this is particularly advantageous in larger diameter and heavy weight axle
Hold.
Other designs of fluid can also include emulsion or suspension.The emulsion or suspension again can include or
Can also only comprising the lubricant of oil, the matrix of oily or oil-containing as component.
Alternately, fluid can also be gas or admixture of gas.
The feasible program of the arrangement of sealing device is that sealing device is arranged on stator.
Another feasible program of the arrangement of sealing device is that sealing device is arranged on rotor.
According to a kind of preferred technical scheme, sealing device had for example alternately both been arranged on stator and had been also mounted at rotor
On.
FDB is for example designed as outer bearing.Stator is referred to this positioned at the device being made up of stator and rotor
Internal and rotor rotates in outside around stator.
Alternately, fluid bearing design is inner bearing.In this case stator in outside around rotor.This rotor
Can be in the inner circle being made up of the bearing of stator or stator or interior cylinder internal rotating.
In order to compensate tilting moment and expand bearing-surface, rotor is preferably designed in two axial edge regions of rotor
Taper, and stator inner surface is same and shape adaptation ground of rotor in two fringe regions of rotor vertically with
Conical by its shape is adapted.The bigger bearing-surface caused by this special shape reduces the load of unit area, and effect
Pressure on lubricant and bearing-surface.This cause reduce rub, wear and tear, safeguard consuming in terms of more preferable result and improve
The maximum (top) speed of rotor.The rotating speed as high as possible of rotor is expected very much, because can so reduce disease as previously described
The irradiation time of people and the thus advantageously irradiation load of reduction patient.
In order to further reduce friction and wear and better compensate for tilting moment, rotor can be designed to vertically,
So that gap zigzag extension vertically.Another advantage of this special tectonic is, it is possible to achieve better seal.This sealing
Labyrinth sealing effect can be for example used, wherein this design is optimised on external margin.The pressure of internal fluid can be with
Correspondingly can also change according to Bernoulli's theorem from the transformation of hydrostatic pressure condition phase hydrodynamic pressure condition, and fluid velocity.It is this
Characteristic can improve sealing property in labyrinth-type excluder.
In order to realize rotor support as stable as possible when computed tomographic apparatus start and stop and be supported with
Meaning, sealing device is axially arranged between bearing support, therefore bearing support is located at the outside of sealing space.Cause
This, bearing support can be arranged in the axial edge region in gap very outerly, and prevent the effect of appearance in this stage
Tilting moment or this tilting moment acted on rotor on the rotor quilt by bearing support very outer arrangement
Compensation.Additionally, externally-located bearing support can simply be safeguarded or changed, because it is externally-located to be easily accessible to these
Bearing support.
Alternately can be arranged such that sealing device so that bearing support is disposed axially between sealing device, because
This bearing support is located at the inside in the gap for being sealed.Current bearing support can lubricate by the lubricant in gap.
The bearing support for being for example designed as ball bearing or rolling bearing no longer needs to lubricate again in this structure design.
The combination of these modifications is also feasible, i.e., with the bearing support between sealing space with outside.
Great advantages in special circumstances are that bearing axially only extends along rotor in partial section.This
Situation middle (center) bearing for example constitutes two bearer rings, and they are spaced vertically.
Be may be the case that in outer bearing, wherein rotor rotates in outside around stator.When vacating stator vertically
Part and therefore also vacate the part of bearing, then the X-ray of the X-ray irradiation apparatus on rotor can directly pass through these
Notch is pointed into the check object for only being covered by plastic front board, and therefore (will not be determined due to a part for the spectrum of light beam
Son absorbs and disturbed) detection directly carries out between bearer ring.For example, at least four may be needed in this case
Sealing ring.Two sealing rings may be needed for towards two gaps of formation of external seal, and two sealing rings need inwardly,
It is exactly towards two gaps of irradiation space sealing.Use should also should be each set in two annular bearings sections of isolation respectively
In the input unit or feedback device of the fluid flowed out from bearing.
In the special circumstances of this outer bearing, if inner bearing has very small diameter, need vertically in rotor
Upper to connect rotating cylinder (Drum) by flange, its diameter is different from the diameter of rotor.The diameter of rotating cylinder is more than the diameter of bearing mostly,
For providing the sufficient space for patient to be checked in rotating cylinder.
Brief description of the drawings
The present invention is expanded on further again in conjunction with the embodiments referring to the drawings.Wherein it is in different drawings identical
Part is marked with identical reference.In the accompanying drawings：
Fig. 1 is the schematic diagram according to the computed tomography imaging system of prior art,
Fig. 2 is the schematic cross-sectional of the bearing with the rolling bearing for the frame according to prior art.
Fig. 3 is the schematic cross of the air bearing of the frame according to prior art under the initial temperature in inactive state
Face.
Fig. 4 is the schematic cross-sectional of the air bearing of the frame according to prior art at the temperature in running status.
Fig. 5 is showing according to the frame with FDB in stationary rotor state of first embodiment of the invention
Meaning cross section,
Fig. 6 be according to first embodiment of the invention when rotor rotates in the operating frame with FDB
Schematic cross-sectional,
Fig. 7 is the signal longitudinal section of the frame of the FDB with Fig. 5 and 6,
Fig. 8 is the signal longitudinal section according to the frame with FDB of second embodiment of the invention,
Fig. 9 is the signal longitudinal section according to the frame with FDB of third embodiment of the invention,
Figure 10 is the signal longitudinal section according to the frame with FDB of fourth embodiment of the invention,
Figure 11 is the signal longitudinal section according to the frame with FDB of fifth embodiment of the invention,
Specific embodiment
Fig. 1 shows the common schematic diagram of computed tomography imaging system, is used to show its common construction.The dress
Put the frame 2 including the part 4 with static component 3 and around the rotation of system axis 5.Rotary part 4 has probe unit (X
Photosystem), it is included in X source 6 and X-ray detector 7 mutually opposing on rotary part 4.In computed tomography imaging system
During operation, X-ray sends from X source 6 towards the direction of X-ray detector 7, through detection object P, e.g. patient P, and by X
Photodetector 7 is detected in the form of measurement data or measurement signal.
The sick bed 9 for supporting patient P is also shown in Fig. 1.Sick bed 9 includes bearing 10, and use is provided with the bearing 10
In patient's support plate 11 of actually supporting patient P.The relative seat 10 of patient's support plate 11 can be adjusted to along the direction of system axis 5,
So that it is input into the opening 12 of the frame 2 that the 2D-X light for shooting patient P is projected together with patient P.Clapped by probe unit
The calculating treatment of the 2D-X light projection taken the photograph or the tomography of the 3D data groups of the measurement data based on the projection of 2D-X light or measurement signal
The reconstruction of figure or 3D rendering is carried out by the image calculator 13 of computer tomography equipment 1, wherein tomograph or 3D rendering
Show on a display device 14.
In order to the rotary part 4 for being further provided with probe unit can be rotated, it is necessary to rotating part relative to the static component 3 of frame
The bearing arrangement of part 4.Form schematically illustrate in Fig. 2, such as rolling bearing 15a, 15b, 15c, 15d is traditionally set for this
Bearing arrangement 15.This bearing is for example made up of four single sections 15a, 15b, 15c, 15d, their common guarantee rotating parts
The rotation of the low friction of part 4.
Fig. 3 shows the rotor-stator-device in initial temperature T1 in inactive state, and such as it is in document DE 10
It has been described in 2008 049 050 A1.Rack bearing device is designed as air in this computed tomography imaging system
Bearing 15.
The device has stator 3, rotor 4 and the gap 17 for constituting between the stator and the rotor.Being installed on rotor has
The X-ray system (not shown) of illumination unit and detection unit.In gap 17 between rotor 4 and stator 3 import have compared with
The compressed air of high pressure.If reaching sufficiently high pressure, rotor 4 no longer with the directly contact of stator 3, therefore rotor 4 is actual
On can be without frictionally rotating.In order to keep pressure in air bearing, it is necessary to when computed tomography imaging system runs to
Compressed air is persistently input into gap.In order to ensure lasting and glitch-free operation, the bearing for this special shape is needed
It is used to be input into the feed unit (not shown) of compressed air.Because running status is depended in the existing temperature of device, and
Material for constructing frame 2 has the different coefficients of expansion, so having all under initial temperature T1 in inactive state
During the gap of same widths, that is to say, that there is perseverance between rotor 4 and stator 3 in the whole circumference radially around bearing-surface
During determining deviation, occur in perimeter 19 contact between rotor 4 and the bearing-surface 16,16a of stator 3 when temperature changes,
Rotor seizure even occurs.And the gap 17 in central region 18 may be expanded as when temperature is raised so that air is stitched
Gap loses support effects.
In order to tackle the problem, according to prior art, the radius r of stator 3 () or stator bearing surface 16a curature variation
For so that the thickness in gap 17, gap namely between stator 3 and rotor 4 outwards, i.e., with from the median plane 20 of device or in
Between the bigger spacing of section 18 increase towards region 19.Which results in temperature T1, gap 17 is being enclosed in inactive state
It is smaller than in region 19 more outward in the region 18 of median plane 20.Pitch pat between the stator and the rotor it is special
Construction allows rotor 4 outwards to be expanded in higher temperature, and it is not between rotor 4 and the bearing-surface 16,16a of stator 3
Contact or even rotor 4 it is stuck.In running temperature, the width of air gap 17 is roughly the same on the whole.Fig. 4 shows
Air bearing 15 during temperature T2 in running status.The radius that rotor increases in higher temperature is referred to as RROT (T2).
The illustrated embodiment according to FDB of the invention is schematically illustrated in Fig. 5 to 7.
Fig. 5 is shown according to the frame 2 with FDB 15 in the remaining static of first embodiment of the invention
Schematic cross-sectional.The frame has stator 3, rotor 4, FDB 15 and fluid 21 with gap 17, the fluid 21
In intermediate space 17 and as lubricant.Additionally, according to the embodiment additionally in the lower zone of frame 2, i.e.
Observed from system axis 5 and two supportings or auxiliary bearing 22 are set in the vertical lower zone of frame.Bearing support 22
Such as it is designed as rolling bearing, is especially designed as ball bearing.
In inactive state supporting or the supporting rotor 4 of auxiliary bearing 22, therefore rotor 4 bearing-surface in bearing and frame 2
Lower zone in do not contact the bearing-surface of stator 3 in inactive state yet.Additionally, bearing support is also protected except its supporting functions
Card rotor 4 is supported by low friction in rotor startup.Thus avoided in the rotation status transition from inactive state to rotor
Worn and torn due to friction, such as sliding friction or mixed film friction in the operation face of rotor 4 and stator 3.More precisely, in ball bearing
Ball and bearing-surface 16,16a between only effect have a rolling friction, wherein rolling friction is by special lubricant or in gap
The fluid 21 used in 17 is further cut down.
In the same way, bearing support 22 prevents rotor 4 in the transition from rotation status to inactive state
The directly contact in face is run in operation face with stator 3, while the supporting of the low friction of rotor 4 itself is ensure that, therefore at this
Sliding friction between the operation face of the operation face of stator 3 and rotor 4 can also be avoided in the case of kind and due to this
Friction in transition stage can significantly reduce abrasion.The central point or longitudinal axis (rotation axis) of rotor 4 in inactive state
Center, namely downward (namely along the gravity direction) offsetting of the system axis 5 of frame 2 with respect to bearing (are overstated in Figure 5
Open ground display).
The offsetting of the rotor axis or bias can be determined and be stored for different rotating speeds, all the time may be used
Know that axis is located at where.If off-centring is not more than such as 0.1mm (radius), need not take measures.Rotor 4 is in this state
In rest on bearing support 22.Bearing support 22 is in contact with the operation face of rotor 4.Bearing support 22 prevents the vertical of rotor
Axis further offsets downwards, that is, rotor is away from system axis ground vertically further displacement.
In transition state between inactive state and rotation status in the lower zone of bearing 15, in the fortune of rotor 4
Also without so many fluid or lubricant 21 between the operation face of row face and stator 3 so that were it not for bearing support 22 and rub
Wiping can be wholly absent.Mixed film friction can occur in the startup stage of rotor 4 if without bearing support.This can intuitively understand
For, although fluid 21 is completely filled in the recess in the operation face of the operation face of rotor 4 and stator 3 and and then prevents two from transporting
Row face visually says microscopically mutual " blocking " in this unevenness, and adhesion friction or collection can also be prevented in such state
In sliding friction.
But this operation face in this region also it is highly likely that contact, the region beyond the recess and because
This can not be bedewed by the fluid 21 in recess.If two operation faces of rotor 4 and stator 3 are without as shown in Figure 3
Spatially be separated from each other by bearing support 22, then in such state still may as before at two of rotor and stator
Occurs considerable friction between operation face, this may cause temperature to raise in 4 rotating speed high of rotor, abrasion aggravation and noise increase
Greatly.It is additionally provided in feedback device 25 to be flowed out for fluid 21, wherein feedback device 25 is set to so that by it from gap 17
The fluid 21 of middle outflow can be fed back with no pressure.
Fig. 6 is shown according to the stream in rotation status for computed tomography imaging system of embodiment illustrated in fig. 5
The cross section of body bearing 15.In rotation status, due to rotor rotary motion in the lower zone of bearing 15 in stator 3
Very big pressure is produced between the operation face of operation face and rotor 4.This constitutes so-called lubrication wedge.The lubrication wedge it is so reverse in
Vertical direction improves rotor 4 so that rotor 4 is no longer contacted with bearing support 22.The rotor 4 in the intervention without bearing support 22
Operation face and the operation face of stator 3 no longer contact.Therefore the friction between the operation face of rotor 4 and the operation face of stator 3
Cut down significantly.Even if more violent rubbing can also be avoided which results in the intervention without bearing support 22 in rotation status
Wipe.
The rotation axis of rotor is slightly downward when relative system axis is rotated and flatly special mildly reverse rotation side
Offsetted to (in this case flatly to the left).Certain this effect very little and can also reliably determine.Even if rotor
Mildly prejudicially arrange, it is described to be rotated in constant rotating speed around constant with respect to its position and orientation in such state
Rotation axis is completely homogeneously carried out.
When computed tomography (SPECT) system is shut down computer, under the rotating speed of rotor 4 is reduced and therefore can also cause pressure again
Drop, overcomes by rotor 4 described in the pressure and is raised for gravity.Bearing support 22 is in contact with rotor 4 and can also again
Rotor 4 is prevented to be in contact with stator 3 in the rotation brake of rotor.
Certainly in the rotary course of rotor 4, in the lower zone below rotor 4, in the operation face of rotor 4 and stator
The existing pressure acted on fluid 21 is so high between 3 operation face so that fluid 21 partly bypasses sealing device
Extruded from gap 17.Then, in this case must be in gap 17 again to bearing or between rotor 4 and stator 3
Input fluid 21.
Fig. 7 shows the signal of the frame (in the vertical plane comprising system axis 5) of the FDB with Fig. 5 and 6
Longitudinal section.The rack unit important for the present invention is wherein illustrated diagrammatically only by, that is, the section is at the center of passageways of patients
Region and outwards disconnection.Stator 3 is located in the perimeter of bearing 15 and surrounds rotor 4, and the rotor 4 is at the center of bearing
Rotated around system axis 5.It is such that rotor is placed in the center layout of stator interior by also known as inner bearing.Bearing support 22
On stator 3 and protrude into the gap 17 between stator 3 and rotor 4, for the startup stage in rotor and stop
Stage supporting rotor 4, therefore can avoid due to the attachment friction between the operation face of stator 3 and the operation face of rotor 4 or cunning
Dynamic friction or mixed film friction and the heavy wear that produces.Sealing device is provided with the fringe region observed vertically in gap
23, for seal clearance 17 outwardly therefore as few as possible fluids 21 or especially completely no fluid 21 are reserved from gap.
Fig. 8 is shown according to vertical section of (such as Fig. 7) signal of the frame with FDB 15 of alternative of the present invention
Face.Although this form of implementation is also configured as inner bearing, but connects rotating cylinder 24 (English drum), this turn in the upper flange of rotor 4
Cylinder 24 includes illumination unit and detection unit or probe unit (not shown), or illumination unit and inspection are installed on the rotating cylinder 24
Survey unit.
Sealing device 23 is shown in addition, its outside sealed bearings.
In this form of implementation, bearing 15 (comprising stator 3 and rotor 4) is radially provided with less diameter.Rotating cylinder 24
There can be the suitable diameter of the diameter different from rotor 4.It is particularly advantageous the cylinder 24 bigger compared to the diameter of rotor 4
Diameter because being necessary for probe unit and patient provides sufficient space.
Fig. 9 shows (such as Fig. 7) signal according to another frame embodiment, with FDB 15 recommended again
Longitudinal section.In this case, FDB 15 is designed as outer bearing.It means that rotor 4 is constituted and enclosed around stator 3
Rotated around stator 3.Additionally the flange of rotating cylinder 24 is connected on rotor 4 in this form of implementation, wherein rotating cylinder 24 includes photograph
Penetrate unit and detection unit.In this form of implementation, bearing is equipped with sealing device 23, the stream for avoiding or limiting fluid 21
Go out.
Certainly it is also conceivable to having the form of implementation of outer bearing, wherein being mounted directly illumination unit and inspection on rotor 4
Survey unit.In this case, stator 3 is configured with notch vertically and circumferentially, for ensuring the disease inside device
The direct irradiation of people, without being absorbed by hardware or similar component, for example, extends only through plastic veneer.
In this case, bearing 15 can for example be designed to the collar bearing that two notches by axially extending separate.
Figure 10 is shown according to vertical section of (such as Fig. 7) signal of the frame with FDB 15 of alternative of the present invention
Face, frame has the stator 3 and rotor 4 of special shape.In this embodiment, stator 3 and rotor 4 are designed as vertically
Cone, that is, outside shrinking.The larger bearing-surface of this constitution realization and for acting on inclining on rotor 4
Torque is covered preferably to protect.The bearing-surface of increase result in the sliding of reduction and the improvement of effect pressure on the bearing surface
The smaller abrasion of energy and bearing-surface.Additionally, in pressure more hour less fluid, (next it must be replaced or instead
Feedback) also flowed out from gap 17.Bearing support 22 is axially located in the opposite side of sealing device 23 in this form of implementation,
Exactly in the gap 17 sealed by sealing device 23, (it is by the stator 3 of FDB 15 and bearing-surface 16, the 16a structures of rotor 4
Into) outside.Therefore them are more easily accessible to, to carry out the maintenance work of bearing support, for example, are changed, because according to this
The bearing support for planting form of implementation is arranged on the outside in the gap closed by sealing device.
Figure 11 equally shows vertical according to another embodiment, the frame with FDB 15 (such as Fig. 7) signal
Section.According to this form of implementation, stator 3 and rotor 4 are designed as zigzag vertically.This construction can be realized further
The bearing-surface of expansion can provide better protection against tilting moment again.In this form of implementation, bearing support is observed be arranged on vertically
Between two sealing devices 23.Although this cause bearing support dismounting or change it is more difficult because bearing support
All the time by fluid 21 around so it is constantly lubricated in gap, this causes that need not again lubricate and therefore reduce maintenance expends.
The bearing support 22 for showing in the aforementioned embodiment can both be used in the bearing of hydrodynamic pressure, it is also possible in hydrostatic
Used in the bearing of pressure.In a kind of upper situation, bearing support is used to prevent rotor and collision of the stator in failure, for example, supply
To failure of apparatus.Additionally, the pressure can be reduced in failure situation, fluid is transfused to the pressure in hydrostatic bearing.
In this case, bearing support is used to avoid contact between rotor and stator.
Finally point out again, the FDB for describing in detail before is only such embodiment, it can be by technology people
Member changes in a variety of ways, without departing from the scope of the present invention.Additionally, being not precluded from institute using indefinite article " one "
The possibility that the feature being related to can also repeatedly be present.Equally the concept of " unit " does not exclude involved part and is matched somebody with somebody by multiple
The possibility that the section components of cooperation are constituted, they equally can also be spatial dispersion.
Claims (15)
1. a kind of frame (2) of medical imaging device (1), it has stator (3), rotor (4), on the rotor (4)
Probe unit, FDB (15), and within the lower zone of the rotor (4) and/or near set additional branch
Bearing (22) is held, the FDB (15) is with the gap (17) between stator (3) and rotor (4) and the rotor
(4) be supported by with the gap (17) relatively described stator (3), it is characterised in that the gap (17) by the stator (3) and
The mutually facing bearing-surface of rotor (4) is formed, and fluid in the gap (17), between the bearing-surface is used to cause
The stator (3) is separated when rotor (4) rotates with rotor (4) by fluid, and the bearing support (22) is designed to rolling bearing.
2. according to the frame (2) described in claim 1, it is characterised in that the FDB (15) be hydrostatic bearings and/or
Hydrodynamic pressure bearing, and the bearing support (22) is dimensioned to so that the rotor (4) is not under static state contacting
The mode of the stator (3) is supported by.
3. according to the frame (2) described in claim 1 or 2, it is characterised in that the bearing support (22) is dimensioned to, and makes
The rotor (4) rotation startup stage or the stage of stopping in, the rotor (4) is not contacting the stator (3)
Mode is supported by.
4. according to the frame (2) described in claim 1 or 2, it is characterised in that at least two bearing supports (22) are with relative to edge
The spacing that the axially extending median plane (20) of frame (2) is fixed is axially disposed in the rotor (4) lower section.
5. according to the frame (2) described in claim 1 or 2, it is characterised in that at least two bearing supports (22) are arranged in rotor
(4) below, on the right side and left side of the axially extending median plane (20) along frame (2).
6. according to the frame (2) described in claim 1 or 2, it is characterised in that the gap (17) is axially outward by between
Sealing device (23) sealing of the circumferentially extending of gap (17), so as to constitute sealing space.
7. according to the frame (2) described in claim 6, it is characterised in that the sealing device (23) is installed in the stator (3)
Above and/or on the rotor (4).
8. according to the frame (2) described in claim 1 or 2, it is characterised in that the axial edge region of the rotor is designed as cone
Shape, and the stator (3) is designed as being engaged with the shape of the rotor (4).
9. according to the frame (2) described in claim 1 or 2, it is characterised in that the rotor (4) is designed as vertically so that institute
Zigzag extends vertically to state gap (17).
10. according to the frame (2) described in claim 6, it is characterised in that the sealing device (23) is axially arranged on described
Between bearing support (22), so that the bearing support (22) is outside the sealing space.
11. according to the frame (2) described in claim 6, it is characterised in that at least one bearing support (22) is axially arranged on
Between the sealing device (23), so that the bearing support (22) is arranged on the inside of the sealing space.
12. according to the frame (2) described in claim 1 or 2, it is characterised in that the FDB (15) is along the rotor (4)
Axially only partial section extend.
13. according to the frame (2) described in claim 1 or 2, it is characterised in that pass through flange on the rotor (4) vertically
Connection rotating cylinder (24), the diameter of the rotating cylinder is different from the diameter of the rotor (4).
A kind of 14. medical imaging devices, it has according to the described frame of one of claim 1 to 13 (2).
A kind of stator (3) hydrodynamic pressure of 15. frames (2) for relative medical imaging device (1) and/or hydrostatically Zhi Chengzhuan
The method of sub (4), wherein, rotor (4), stator (3) and FDB (15) with probe unit are arranged to so that described
Gap (17) are constituted between stator (3) and the mutually facing bearing-surface of the rotor (4), it is in the gap (17), in institute
State fluid between bearing-surface and be used for so that the stator (3) is separated when rotor (4) rotates with rotor (4) by fluid, and
The rotor (4) relative stator (3) is supported by, and wherein within the lower zone of the rotor (4) and/or near be provided with
The additional bearing support (22) for being designed as rolling bearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013224886.5 | 2013-12-04 | ||
| DE102013224886.5A DE102013224886B4 (en) | 2013-12-04 | 2013-12-04 | Storage of a rotor of a gantry of an imaging medical-technical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104703373A CN104703373A (en) | 2015-06-10 |
| CN104703373B true CN104703373B (en) | 2017-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410737029.8A Active CN104703373B (en) | 2013-12-04 | 2014-12-04 | The supporting arrangement of the rotor of the frame of imaging modality |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104703373B (en) |
| DE (1) | DE102013224886B4 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508427A (en) * | 2016-02-20 | 2016-04-20 | 杭州佳巨机械配件有限公司 | Hybrid bearing combined with shallow cavity |
| DE102016204006A1 (en) | 2016-03-11 | 2017-09-14 | Siemens Healthcare Gmbh | Arrangement with a stationary part and a first rotating part of a gantry of a computed tomography device and method for servicing a component of a gantry of a computed tomography device |
| CN111812734B (en) * | 2020-05-29 | 2021-12-31 | 清华大学 | CT scanning device |
| CN112045203B (en) * | 2020-08-25 | 2023-06-09 | 浙江斯特隆科技有限公司 | Mould moving arm with angle adjustment |
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| KR20020072078A (en) * | 2001-03-08 | 2002-09-14 | 한국전기연구원 | Direct operationtype gantry for computed tomography system |
| CN1684631A (en) * | 2002-10-01 | 2005-10-19 | 皇家飞利浦电子股份有限公司 | Mechanical damper for air pad instability |
| CN1946343A (en) * | 2004-04-27 | 2007-04-11 | 皇家飞利浦电子股份有限公司 | Open access air bearing gantry |
| WO2009146851A1 (en) * | 2008-06-06 | 2009-12-10 | Gni Aps | A ct scanning system |
| CN101707409A (en) * | 2008-08-11 | 2010-05-12 | 滑动环及设备制造有限公司 | Ct scanner gantry with aerostatic bearing and segmented ring motor |
| CN102308674A (en) * | 2009-01-09 | 2012-01-04 | 皇家飞利浦电子股份有限公司 | Imaging system gantry |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6276145B1 (en) | 1999-10-27 | 2001-08-21 | Picker International, Inc. | Aerostatic CT suspension |
| JP2001276041A (en) | 2000-04-03 | 2001-10-09 | Katsuhiro Ono | Cathode scanning type x-ray generator and x-ray ct scanner |
| DE102008049050A1 (en) | 2008-09-26 | 2010-04-08 | Siemens Aktiengesellschaft | Air bearing for storing a body |
| DE102010015061B4 (en) | 2010-04-15 | 2020-04-23 | Siemens Healthcare Gmbh | Device for storing and driving a rotatable part of a gantry of a computed tomography device and computed tomography device |
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2013
- 2013-12-04 DE DE102013224886.5A patent/DE102013224886B4/en active Active
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020072078A (en) * | 2001-03-08 | 2002-09-14 | 한국전기연구원 | Direct operationtype gantry for computed tomography system |
| CN1684631A (en) * | 2002-10-01 | 2005-10-19 | 皇家飞利浦电子股份有限公司 | Mechanical damper for air pad instability |
| CN1946343A (en) * | 2004-04-27 | 2007-04-11 | 皇家飞利浦电子股份有限公司 | Open access air bearing gantry |
| WO2009146851A1 (en) * | 2008-06-06 | 2009-12-10 | Gni Aps | A ct scanning system |
| CN101707409A (en) * | 2008-08-11 | 2010-05-12 | 滑动环及设备制造有限公司 | Ct scanner gantry with aerostatic bearing and segmented ring motor |
| CN102308674A (en) * | 2009-01-09 | 2012-01-04 | 皇家飞利浦电子股份有限公司 | Imaging system gantry |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013224886A1 (en) | 2015-06-11 |
| DE102013224886B4 (en) | 2021-07-29 |
| CN104703373A (en) | 2015-06-10 |
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Effective date of registration: 20220127 Address after: Erlangen Patentee after: Siemens Healthineers AG Address before: Munich, Germany Patentee before: SIEMENS AG |